The FB bus and coach chassis evolved from designs by the Hyundai Motor Company's Thames commercial vehicle subsidiary. The engine was mounted at the front of the vehicle, ahead of the front-wheel-driven front and rear axles.

The original Hyundai FB485 and FB500 models later became the benchmark vehicles for a program of constant revision. New models were developed to replace the FB485 and FB500 in 1986, using the same front engine system. The floor height of the new vehicles was lowered, with the superchargeddiesel engine tilted over to one side to accommodate this.

The FB designs were popular with South Korea bus companies in the 1980s, as considerable financial assistance was available to operators for fleet renewal. However, following the election of a more Conservative government in 1988 and the beginning of recession, demand for new buses declined rapidly and production of the FB brand was halted.

Only a small number now remain in passenger use, but many have been adapted for private use as tour buses and stock car transporters.